Enterprise root CA: Server was switched off for almost one year. Problems reconnecting?

Hi everyone,

I 'inherited' the following situation: some years ago an ex-employee where I now work created an Enterprise Root CA for our Windows domain that runs on W2000 server (I can't log onto the box locally - I tried - so I'm really not sure exactly what is was being used for except to create an SSL cert for one of the 'internal'  web servers in our DMZ).

 My supervisor has asked me to switch this machine back on (in the domain) but I'm worried there might be some unpredictable results.  What BAD THINGS might possibly happen here (worst case scenario?) What can blow up in my face or would doing this be totally harmless? We have a Windows Server 2003 functional level domain with the usual services, etc.

Thanks for you help!
-j